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WorksheetsFluids and Pressure Worksheet
Total questions: 38
Worksheet time: 6mins
Which of the following statements is TRUE about gases?
Gases are incompressible
Gases can occupy any space available
Gases have fixed volume
Gases cannot flow
What causes pressure at a point inside a liquid?
The temperature of the liquid
The weight of the liquid column above that point
The color of the liquid
The speed of flow
Which formula is correct for calculating pressure?
P = A / F
P = F × A
P = F / A
P=A/F2
Why can’t humans dive deep without special equipment?
The water becomes too cold
The light disappears
The pressure increases and affects the body
Fluids cannot flow.
True
False
The unit of force is Pascal. (It is Newton)
True
False
Pressure is caused by the weight of the liquid column above.
True
False
Define “fluid.”
A substance that can flow, such as a liquid or a gas.
A solid that cannot change shape.
A material that is always a gas.
A substance that cannot move at all.
Give one example showing the effect of liquid pressure.
The deeper you dive in water, the more pressure you feel on your ears.
A stone floats on water.
Water boils at 100°C.
Ice melts at room temperature.
The air we breathe is:
Pure nitrogen
Pure oxygen
A mixture of gases
Oxygen only
The pressure exerted by the weight of the air around the Earth is called:
Liquid pressure
Air force
Atmospheric pressure
Water pressure
The unit of atmospheric pressure is:
Pascal (Pa)
Joule (J)
Newton (N)
Watt (W)
Which factor causes an increase in liquid pressure?
Increase in temperature
Increase in depth
Decrease in density
Decrease in area
1 atmosphere (atm) is equivalent to:
1.013 × 10⁵ N/m²
1.013 × 10³ N/m²
1.013 × 10⁴ N/m²
1.013 × 10⁶ N/m²
Pressure inside a liquid depends on its color.
True
False
Pressure increases with depth.
True
False
The total pressure at a point inside a liquid includes both atmospheric and liquid pressure.
True
False
Atmospheric pressure is:
the force exerted by the weight of air on a surface
the pressure inside a solid object
the pressure caused by water vapor only
the force exerted by gravity on solids
Pressure is higher in seawater than in freshwater because:
Seawater is denser than freshwater.
Seawater is warmer than freshwater.
Seawater contains more oxygen than freshwater.
Seawater is less salty than freshwater.
The swim bladder (air bladder) helps fish to:
Breathe underwater
Digest food
Control buoyancy and balance
Absorb sunlight
Salmon fish are examples of:
Surface organisms
Deep-sea organisms
Intermediate-depth organisms
Microscopic organisms
Pressure decreases with depth in the ocean.
True
False
Surface organisms are adapted to very high pressure.
True
False
What happens to water pressure as depth increases?
Water pressure decreases as depth increases.
Water pressure remains the same as depth increases.
Water pressure increases as depth increases.
Water pressure fluctuates randomly as depth increases.
What adaptation helps intermediate-depth fish control their movement?
Swim bladder
Sharp teeth
Bioluminescence
Thick scales
Which of the following statements is TRUE about deep-sea organisms?
They live under low pressure.
They have weak body structures.
They have strong, compact body structures
They contain gases in their bodies.
What helps deep-sea organisms resist high pressure?
Thin and soft bodies
Protein components and internal fluids
Air-filled bladders
Scales filled with gas
Why don’t deep-sea organisms have gas-filled bladders?
Gases make them too heavy.
Gases expand and cause the body to collapse under high pressure
Gases increase body temperature.
Gases turn into liquids underwater.
Instead of swim bladders, deep-sea fish rely on:
Gills filled with oxygen
A large liver rich in oil
Bones filled with gas
Water stored in the skin
The liver of deep-sea fish helps them to:
Absorb sunlight
Control buoyancy
Produce oxygen
Remove salt
The cell membranes of deep-sea organisms are rich in:
Saturated fatty acids
Unsaturated fatty acids
Proteins only
Salts and minerals
The function of unsaturated fatty acids in cell membranes is to:
Make them solid and rigid
Maintain fluidity and flexibility
Increase temperature
Block oxygen
Deep-sea organisms live where pressure is low.
True
False
Ray fish is an example of a deep-sea organism.
True
False
Saturated fatty acids remain liquid at room temperature.
True
False
What is the main challenge for organisms living at great depths?
The extremely high water pressure.
The abundance of sunlight.
The presence of many predators.
The high oxygen concentration.
Why do deep-sea organisms contain internal fluids instead of gases?
Because gases compress easily under pressure, but liquids do not.
Because fluids are lighter than gases.
Because fluids provide more oxygen than gases.
Because gases are toxic to deep-sea organisms.
Mention one adaptation that helps deep-sea organisms survive.
Having a large liver filled with oil or flexible cell membranes rich in unsaturated fatty acids.
Having bright colors to attract mates.
Living only near the ocean surface.
Relying on photosynthesis for energy.
